With any tablet you may purchase there will be pros and cons that are inherant for any size. For example when you purchase a 10-inch tablet you'll have to deal with a much larger device which can become awkward to hold over time, but you will get more screen real estate. Tranversly if you purchase a smaller 7-inch tablet you'll have to deal with having smaller screen real estate (lots of zooming and panning), but you get a more portable tablet experience since you can fit most 7-inch tablets in small bag or jacket pocket.
With those inherant pros and cons consumers have make a decision on what is most improtant to them in tablet. Having a bigger screen (which often times features a higher resolution) is best for someone looking to watch HD movies or browse full web pages like they do on a desktop or laptop. Having a smaller screen, as mentioned above, means you'll be able to treat your tablet like a smart phone and take it with you everywhere you go since it's relatively small.
Now I say all of that to get to a point I would like to make about 7-inch tablets and their major problem as tablets. The 7-inch tablet, most of the time, has too low of a resolution to provide users with a user experience that is much better than a 4-inch smart phone.
Resolution limitations for tablets like the Amazon Kindle Fire and Barnes & Noble Nook Tablet have forced users to deal with having to constantly pan and zoom in digital publications like magazines and eBooks, and when they get the desktop version of a website they have to do the same thing (most of the time 7-inch tablets are routed to the mobile version of websits if they're available just like smart phones are).
You can learn to deal with having to pan and zoom when doing just about anything, but you really don't have to. There are a few tablets that feature slightly larger and higher resolution 8.2 to 8.9-inch screens that offer portability without sacrificing the user experience. There is the LG G-Slate/Optimus Pad, Motorola Zyboard 8.2/XOOM 2 Media Edition, and the Samsung Galaxy Tab 8.9 to name the premier 8.9-inch tablets.
With either of those 8.2 and 8.9-inch models just listed you get the same resolution that most 10-inch tablets have in a smaller all-round package. You should know that 8.2 and 8.9-inch tablets weight less and are often times thinner than 10-inch tablets, so much so that they even approach the terratory of 7-inch tablets in size and weight.
Going forward in to 2012 I expect to see many more 8.2 and 8.9-inch tablets introduced into the market. The 8.2 and 8.9-inch tablet offers the user experience of a 10.1-inch tablet in a package that is much easier to live with.
Source: http://www.articlesbase.com/gadgets-and-gizmos-articles/the-7-inch-tablets-main-problem-and-a-solution-5514952.html
